The big picture, below, shows where Lafayette is. From Boulder, drive east on South Boulder Road, Baseline, or Arapahoe about 9 miles.
Refer to the detail map below. If on South Boulder Road, turn left on Centaur Village Drive, traffic signal just past Centaurus HS. There's a small shopping center with Dairy Queen at the NE corner of this intersection. Go to a "T" stop at Caria Drive, turn right, then Sparta is the third street on the right.
If on Baseline, turn right on Caria, just before you get to the signal at US 287. There's a BP station on the left at this intersection. Follow Caria to a 4-way stop. Continue straight ahead, and Sparta is the second street on the left.
If on Arapahoe, go south (right) on 287 and turn right on Baseline. Caria is the first left, immediately past the BP station. As above, follow Caria to a 4-way stop. Continue straight ahead, and Sparta is the second street on the left.
(If atmospheric conditions cooperate, you might want to take a brief detour to Waneka Reservoir. Just go to the 4-way stop above, at Emma St., and turn west into the park. Walk the few steps up to the lake for a great view of the mountains.)
870 is the eighth house on the left, light blue with a hedge out front. Lost? We're at 303-665-4131.